<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套 渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }} </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="deleteRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :rules="addFormRules"
        :model="addForm"
        ref="addRoleFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleCancel">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        ref="editRoleFormRef"
        :model="editForm"
        :rules="addFormRules"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleCancel">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisable"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树型控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        default-expand-all
        node-key="id"
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisable = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 说有角色列表数据
      rolelist: [],
      // 添加角色对话框是否显示
      addDialogVisible: false,
      // 添加角色表单数据
      addForm: {
        roleName: "",
        roleDesc: "",
      },
      // 添加角色表单验证规则
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
      },
      // 修改角色对话框是否显示
      editDialogVisible: false,
      // 修改角色表单
      editForm: {},
      // 控制分配权限的对话框是否显示
      setRightDialogVisable: false,
      // 所有权限的数据
      rightsList: [],
      // 树型控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: "",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("/roles");

      if (res.meta.status !== 200) {
        this.$message.error("获取角色列表失败");
        return;
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    // 添加角色对话框关闭时的回调
    addDialogClosed() {
      console.log("dwa");
      this.$refs.addRoleFormRef.resetFields();
      console.log("dwa");
    },
    // 添加角色信息
    addRole() {
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.post("/roles", this.addForm);
        if (res.meta.status !== 201) {
          this.$message.error("添加角色失败");
          return;
        }
        this.$message.success("添加角色成功");
        // 重置表单数据
        this.$refs.addRoleFormRef.resetFields();
        this.addDialogVisible = false;
        this.getRolesList();
      });
    },
    // 取消添加角色按钮
    addRoleCancel() {
      this.$refs.addRoleFormRef.resetFields();
    },
    // 根据id删除角色
    async deleteRoleById(id) {
      console.log(id);
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      console.log(confirmResult);
      // 判断是否点击删除
      if (confirmResult !== "confirm") return this.$message.info("已取消删除");
      console.log("确定删除");
      const { data: res } = await this.$http.delete(`/roles/${id}`);
      if (res.meta.status !== 200) return this.$message.error("删除失败");
      this.$message.success("删除成功");
      this.getRolesList();
    },
    // 修改对话框取消按钮
    editRoleCancel() {
      this.$refs.editRoleFormRef.resetFields();
      this.editDialogVisible = false;
    },
    // 修改对话框x按钮
    editDialogClosed() {
      this.$refs.editRoleFormRef.resetFields();
    },
    // 根据id查询角色信息、
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(`/roles/${id}`);
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户信息失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 执行修改
    async editRole() {
      this.$refs.editRoleFormRef.validate(async (valid) => {
        if (!valid) return;
        //  可以发起网络请求
        const { data: res } = await this.$http.put(
          `/roles/${this.editForm.roleId}`,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          }
        );
        console.log(res);
        if (res.meta.status != 200) {
          return this.$message.error("更新角色数据失败");
        }
        this.$message.success("更新角色数据成功");
        this.editDialogVisible = false;
        this.getRolesList();
      });
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      console.log(confirmResult);

      if (confirmResult !== "confirm") return this.$message.info("已取消删除");
      // 发起网络请求
      const { data: res } = await this.$http.delete(
        `/roles/${role.id}/rights/${rightId}`
      );
      // console.log(res);
      if (res.meta.status !== 200) return this.$message.error("删除权限失败");
      this.$message.success("删除权限成功");
      // 不简易使用重新渲染，因为会发生页面跳动
      // this.getRolesList();

      role.children = res.data; //因为是v-model绑定，所以修改该参数的值，也会修改页面显示的值
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("/rights/tree");

      if (res.meta.status !== 200)
        return this.$message.error("获取权限数据失败");

      this.setRightDialogVisible = true;
      // 把权限数据赋值给this.rightList
      this.rightsList = res.data;
      console.log(this.rightsList);
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      // 打开对话框
      this.setRightDialogVisable = true;
    },
    // 通过递归的形式，获取角色下说有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的监听
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      console.log(keys);
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `/roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      console.log(res);
      if (res.meta.status !== 200) return this.$message.error("分配权限失败");
      this.$message.success("分配权限成功");
      this.getRolesList();
      this.setRightDialogVisable = false;
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px soild #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
